Week 4 CHEM 121 Jeopardy

Precision vs. Accuracy(goal is 1.000 kg)

100

1.001 kg

1.000 kg

0.998 kg

1.003 kg

Accurate and precise 

200

1.173 kg 

1.284 kg 

0.881 kg 

0.917 kg 

Accurate but imprecise

300

2.814 kg 

2.837 kg 

2.822 kg 

2.819 kg 

Inaccurate but precise 

400

0.312 kg 

6.398 kg 

2.141 kg 

0.805 kg 

Neither accurate nor precise 

Density

100

Volume= 15cm³ and mass= 45 g

Find density 

3.0 g/cm³

200

Volume= 30cm³ and mass of 60g

Find density. 

2.0 g/cm³

300

Mass= 45g and Density= 3.0 g/cm³

Find Volume (cm³)

15 cm³

400

Volume= 50.0 mL and density= 1.00 g/mL

Find Mass

50.0 g

500

Determine the density in g/L of an unknown with the following information. A 55 gallon tub weighs 137.5lb when empty and 500.0 lb when filled with the unknown. 

790 g/L

Temperature Conversions

100

30 °C -› K

303.15 K

200

300 K -> °C

26.85 ^oC

300

13^oF -> ^oC

-10.6^oC

400

63^oC -> ^oF

145.4^oC

500

98.6 °F -> K

310.15 K

Mixtures vs. Pure Substance

100

Trail Mix

Mixture- Heterogeneous 

200

Sugar Water

Mixture- homogeneous 

300

Carbon Dioxide 

Pure Substance- compound

400

Copper Wire 

Pure compound- element 

500

Blood

Mixture- homogeneous 

Definitions

100

Study of mass and energy 

Chemistry 

200

Occupies space and has mass

Matter

300

A substance that cannot be broken down into simpler substances

Element

400

A method for understanding the world around us

Scientific Method

500

State of matter that allows atoms or molecules to move relative to one another

Liquid matter